Exercises

The mean weight of players on a football team is 81 Kg. The weights are:

64, 96, 76, 60, 60, 76, 100, 96, 72, 88, 96, 92, 92, 96, 60, 76, 84, 84, 92, ? , where one number is missing. Find it.
The misssing value is Kg.